Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/55r22 vs 285/50r22 Tire Comparison Side By Side
  315/55-22 285/50-22 Difference
Diameter inches (mm) 35.64 (905.3) 33.22 (843.8) -2.42 (-61.5) -6.8%
Width inches (mm) 12.4 (315) 11.22 (285) -1.18 (-30) -9.5%
Circum. inches (mm) 111.97 (2844.08) 104.37 (2650.88) -7.61 (-193.21) -6.8%
Sidewall Height inches (mm) 6.82 (173.25) 5.61 (142.5) -1.21 (-30.75) -17.7%
Revolutions per mile (km) 565.86 (351.61) 607.1 (377.23) 41.24 (25.63) 7.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.64 mph (30 km/h)
25 mph (40.23 km/h)23.3 mph (37.5 km/h)
30 mph (48.28 km/h)27.96 mph (45 km/h)
35 mph (56.33 km/h)32.62 mph (52.5 km/h)
40 mph (64.37 km/h)37.28 mph (60 km/h)
45 mph (72.42 km/h)41.94 mph (67.5 km/h)
50 mph (80.47 km/h)46.6 mph (75 km/h)
55 mph (88.51 km/h)51.26 mph (82.5 km/h)
60 mph (96.56 km/h)55.92 mph (90 km/h)
65 mph (104.61 km/h)60.58 mph (97.5 km/h)
70 mph (112.65 km/h)65.24 mph (105 km/h)
75 mph (120.7 km/h)69.91 mph (112.5 km/h)
80 mph (128.75 km/h)74.57 mph (120 km/h)
85 mph (136.79 km/h)79.23 mph (127.5 km/h)
90 mph (144.84 km/h)83.89 mph (135 km/h)
95 mph (152.89 km/h)88.55 mph (142.5 km/h)
100 mph (160.93 km/h)93.21 mph (150 km/h)

Gear Ratio / RPMs for New Tire (@ 65 mph)
2.35 2.73 2.94 3.07 3.21 3.31 3.42 3.55 3.73 3.91 4.11 4.27 4.56 4.88 5.13 5.29 5.38 5.71 6.17 7.17
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